Pin-puller



Patented Apr. 20, 1920.

IN V EN TO R.

BY i ATTOR Y5.

STATES trimmer a. SMITH, or EASTON, PENNSYLVANIA, Assrenon r0 meEnsoLL-nan'n COMPANY, on JERSEY CITY, NEW JERSEY, a oonroaarron OF NEW Jnnsnz.

PIN-FULLER assaseo.

Specification of Letters Patent.

Patented Apr. 20, 192% Application filed. September 16, 1818, Serial No. 254,317; ,Renewed Harsh 8, 1920. Serial No. 3%,248.

To all whom it may concern:

Be it known that 1, WILLIAM A. SMITH, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania have invented a certam new and useful improvement in Pin- Pullers, of which the following is a specitication.

This invention relates to pin pullers and has reference particularly to a pin puller adapted to be mounted on a drill sharpener for the purpose of withdrawing a pin from the steel after it has been used in the operation of forging the lugs on the drill steel.

The objects of the present invention are to provide a pin puller which may be readily mounted upon the side of a drill sharpener and which may be utilized to withdraw the in from the drill steel as quickly as possi le; also, to provide a pin puller which will be simple, readily operated, and not easily put out of order.

During the process of formation of lugs or collars usually found near the tool end of rock drill steels in steels which are provided with a central hole extending throughout their length, a pin is placed in the end of this central hole extending a short distance within the hole in order to prevent its becoming closed or clogged during the forging and shaping of the lugs or collars. During this operation the pin becomes firmly wedged in the hole and some form of pulling device, in which considerable force can be exerted, is necessary to withdraw it.

The pulling means for the pin should properly be handily mounted in close proximity to the sharpening machine in order to withdraw the pin before the drill steel has become cooled to such a degree as to render the pulling possible without reheating. The present construction. has been -devised to provide such a puller fulfilling these requirements and having these objects, a moredetailed description of which will follow.

With the above and other objects in view, therefore, the present invention consists in the features of construction and operation disclosed in the following specification and illustrated on the accompanying drawings, forming a part hereof, in which- Figure 1 shows, in erspective puller mounted on the si e o a drill ener shown in outline; and

Fig. 2, a drill steel with pin inserted before the lugs or collars have been formed.

a pin sharpa short cross shaft 5 having a cam 6 rigidly fastened thereto. The top portion of the forward projection 3 is slightly co'ncaved as shown at 7 sothat a small bearing is provided for the pin 8. Sliding within the holes 3 provided in projections 3 is a member 9 having at its forward end an abutment 10 against which the drill 11 may rest and also provided with an orifice 12 through which the pin 8 may pass. At the rear end of the member 9 a bifurcated portion 13 is formed having a pin 14 extending between the bifurcations engaging a slot 15 provided in a bell crank lever 16 which may oscillate about a pivot 17 provided in an extension 18 of the base member 1.

Through a reach arm 19 the bell crank 16 is connected with a pedal lever 20 which may be suitably counterweighted by means of weight 21 so that movement downward on the foot portion 22 of the lever 20 will advance the member 9 and abutment 10 forcing them away from the clamping means formed by the projection 3 and cam member 6.

In operation, the drill steel 11 with pin 8 inserted is pressed against the abutment-10, the pin 8 extending through orifice 12 sufficiently to be grasped between the depression 7 and cam member 6. The cam 6 is pressed against the pin 8 by rotating the shaft 5 which may readily be done by means of the ball 15* provided on this shaft. Pedal 22 is now pressed which has-the effect of thrusting forward the abutment 10 and with it the drill steel 11 thus partly remove ing the pin 8 from the drill steel. This op-. eration ma be repeated several times, or until the pm has been completely removed from the drill.

From the above it will be seen that a pin puller has been provided which may be conveniently mounted on the side of a drill sharpener, which is simple and rugged in construction and one that takes up but little space and may be cheaply manufactured.

It is to be understood that the present showing and description disclose only one speclfic embodlment of the present inven- 'tion and that other forms-and modifications are included within the spirit and scope of the invention as expressed in the appended claims. a

What I claim is: 1. In a pin puller for drill Sharpeners, clamping means comprising a stationary and a movable member adapted to securely grasp a pin, a movable abutment against which a drill is adapted to rest and means engaging said abutment for moving it away from said clamping means.

2. In a pin puller for drill sharpeners,

clamping means comprising a. stationary member and. a movable cam member adapted to securely grasp a pin, an abutment' mounted to slide toward and away from said elamping means and means for 20 from said-clamping means and a pin inserted within said drill withdrawn.

In testimony whereof, I have hereunto set 25 my hand. v

. WILLIAM A. SMITH. Witnesses: i

C. W. M-ETZGAR,

H. B. CLAPPISON'. 

